Posts [ 16 ]

Topic: Rate this 20V mod of mine (pics)

hi guys I have finished making up something for my 20V, let us know what you guys think or if you have any suggestions on how to make it better. I want to know this as I might start to make a few of them.

this is a test fit with a corolla and a yaris coilpack. I will be using the Yaris model packs (1NZ)

Re: Rate this 20V mod of mine (pics)

Re: Rate this 20V mod of mine (pics)

well it wouldn't compared to a brand new ignition system. However the rotor button, cap and leads start to deteriate from the first time they are used. With this the only part that needs to be changed is the plugs.

Honestly you wouldnt get this for any power upgrade but instead to simply and neaten things. For me in australia it would costs around AU$100 for the leads and then I would have to mod them to suit my previous twin coils. I bought all 4 of these for $140. Also 20V caps have to be imported over here, luckily I dont use one.

Being in a rear wheel drive orientation I cant have a dizzy so either way I need either this or external coils.

Re: Rate this 20V mod of mine (pics)

there is a definite gain, going from a distributor, to this, where the dizzy's rotor is responsible for directing the spark, since it involved an open ark or spark, between the rotor tip and which ever lead it lines up with, as well as the spark over the plug gap.... not to mention all the severally disruptive high tension noises that is associated with such an open spark in the dizzy... (your electronic stuff will love you for getting rid of your dizzy....)

with this setup, each coil has a very long time to re-charge.... a wasted spark system also has the advantage of only having one gap, for the spark to jump over (that of the sparkplug) but it shares one coil between two plugs, so the charge time is half of that found in a Coil-on-plug system.... nun the less still much better than a Single-coil distributor setup where the coil needs to charge for each and every ignition event....

Nissan1400+ST-4AGTE+PRO-X 0.6bar 174kw-307nm and still on stock std internals.

Re: Rate this 20V mod of mine (pics)

The Stock ignition is very good on the 20v as far as output, The stock coil itself is very good compared to after maket coils like MSD. Perhaps when running a stock setup with stock management it's true that there will not be a difference at all. However with a after market managment and add some mods to that, the ignition can have tons of issues when you need the best timing on your ignition map, so there will be a few things you'll need to iron out before your motor revs smooth. With the XMS I had tons of issues with the ignition map, only after tweaking the setup, playing aorund with the dwell angle, ignition reference and other bits was I able to get to car to rev smooth, but even still when using the stock Dizzy I found that it struggled in the higher rpm even though my compression could handle the timing (no knocking) I had intermident misses. So far since I swithed to Denso Iridium plugs the miss seems to be gone. I think al these issues could of been avoided with wasted spark setup.

I still agree with #Rotor, wasted spark is the way forward, Look how Doc's car runs with that coil packs. I was looking into a set of COP from a 1zz-FE, never knew the Yaris COPs would work What motor is that from, the ZR range?

A wasted spark setup is not really a performance upgrade but rather a upgrade to sustain your performance as you will always have a constant, reliable spark, and because of this you will feel the difference

Re: Rate this 20V mod of mine (pics)

Your ignition timing needs to be spot on. With dizzy type ignition, in this case at the end of the exhaust cam, there is a degree of "spark scatter" for want of a better term as a result of belt stretch/oscilation throughout the rpm range which can't be predicted.

The dizzy system pickups are in the dizzy, hence the stretch influence.

In addition to all the advantages of wasted spark mentioned previously in this thread, you will have your trigger sensor on the crank. This sensor tells the ecu exactly when to fire so no influence from the belt at all.

You will need a second sensor to identify / reset home position. Will this be fitted on the crank aswell or will you use the dizzy for this? Iether way is equally effective as the exact timing of this sensor is not critical. It needs to detect and send a signal at roughly 60deg BTDC purely as a reset function so the ECU never "forgets" when number 1 cylinder is ready for spark. The crank trigger gives the exact firing timing message to the ecu. The ecu then sends out a spark signal to the ignitors per the loaded ignition map.

All in all, I reckon with good tuning you'll have a smoother running engine, much more reliable ignition system and potentially gain a little power.

Additional note : in the pic in the previous thread you can see the distributor is still fitted. It's sole purpose is to send a home signal to the ECU running wasted spark. It will have only one tooth on the pickup wheel which will send a signal every second crank revolution when piston 1 is ready to be fired.

Also, the belt is fitted the incorrect way around for all that comments worth.......

Re: Rate this 20V mod of mine (pics)

yeah I have seen that one, its neat but I just dont like it, I guess mine looks bad because I never did the second part of my conversion: to have a plate that goes on top and covers everything bar the body of the coils. That way the wires are hidden also.